{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T07:10:10Z","timestamp":1750317010128,"version":"3.41.0"},"reference-count":19,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,6,21]],"date-time":"2023-06-21T00:00:00Z","timestamp":1687305600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Fish Biology"],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Fishes of the jawfish family Opistognathidae are cryptobenthic and distributed in subtropical seas, and new species are still being reported. <jats:italic>Opistognathus<\/jats:italic> spp. live alone in burrows and males orally brood their egg clutches. The life cycle of jawfish, including their reproductive behaviour, is poorly understood. Here we describe the natural reproduction and embryonic development of <jats:italic>Opistognathus iyonis<\/jats:italic> in Yamaguchi, Japan, based on underwater surveys for 3\u2009years. Spawning was observed as female jawfish came into the male's burrow ~30\u2009min before sunrise. The jawfish had a mean number of 4.4 egg clutches in the burrow through 48.2\u2009days, and the egg took 12\u2009days to hatching. The mean temperature for developmental days was 20.8\u00b0C. The mean and cumulative water temperature during development significantly correlated with the number of developmental days. During egg development, male jawfish took care of eggs by holding them for part of the time in their mouths. Hatching was observed ~20\u2009min after sunset. When hatching occurred orally, eggs were pushed out and back repeatedly using the lower jaw; consequently, the egg clutches were let out in an upward direction. To our best knowledge, this is the first report of the reproductive behaviour of <jats:italic>O. iyonis<\/jats:italic> in the natural environment in the same area for several years.<\/jats:p>","DOI":"10.1111\/jfb.15473","type":"journal-article","created":{"date-parts":[[2023,6,3]],"date-time":"2023-06-03T11:24:20Z","timestamp":1685791460000},"page":"612-622","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Underwater analysis of the reproductive behaviour and egg development of the jawfish <i>Opistognathus iyonis<\/i>"],"prefix":"10.1111","volume":"103","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0407-9452","authenticated-orcid":false,"given":"Yuki","family":"Nemoto","sequence":"first","affiliation":[{"name":"Department of Veterinary Radiology, Joint Faculty of Veterinary Medicine Yamaguchi University  Yamaguchi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomoyuki","family":"Ogawa","sequence":"additional","affiliation":[{"name":"Diving School Love &amp; Blue  Yamaguchi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,6,21]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/brv.12423"},{"key":"e_1_2_8_3_1","first-page":"70","article-title":"First specimen\u2010based record of Opistognathus variabilis (Opistognathidae) from off Yaku\u2010Shima Island, the Osumi Islands, Kagoshima Prefecture, Japan","volume":"7","author":"Furuhashi R.","year":"2021","journal-title":"Ichthy, Natural History of Fishes of Japan"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/417070a"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0090691.2014"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-294X.2005.02480.x"},{"key":"e_1_2_8_7_1","first-page":"806","article-title":"Male mouthbrooding in jawfishes (Opistognathidae): Constraints on polygyny","volume":"52","author":"Hess H. C.","year":"1993","journal-title":"Bulletin of Marine Science"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1093\/icb\/icr018"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.5479\/si.00963801.46-2011.65"},{"issue":"2","key":"e_1_2_8_10_1","first-page":"139","article-title":"First record of the jawfish, Opistognathus iyonis (Opistognathidae, Perciformes) from Korea","volume":"11","author":"Jung\u2010Goo M.","year":"1999","journal-title":"Korean Journal of Ichthyology"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/jfb.15179"},{"key":"e_1_2_8_12_1","first-page":"35","article-title":"List of the fishes in the Seto Inland Sea off Yamaguchi prefecture (preliminary report)","volume":"15","author":"Kawano M.","year":"2018","journal-title":"Bulletin of the Yamaguchi Prefectural Fisheries Research Centre"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/aja.1002030302"},{"key":"e_1_2_8_14_1","first-page":"79","article-title":"The effect of temperature on the duration of spawning markers\u2014Migratory\u2010nucleus and hydrated oocytes and postovulatory follicles\u2014in the multiple\u2010batch spawner Japanese flounder (Paralichthys olivaceus)","volume":"109","author":"Kurita Y.","year":"2011","journal-title":"Fishery Bulletin"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.2307\/1446351"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00004892"},{"key":"e_1_2_8_17_1","doi-asserted-by":"crossref","first-page":"91","DOI":"10.4067\/S0718-19572005000200001","article-title":"Effect of the incubation temperature on the embryonic development and hatching time of eggs of the red porgy Pagrus pagrus (Linne, 1758) (Pisces: Sparidae)","volume":"40","author":"Radoni\u0107 M.","year":"2005","journal-title":"Revista de Biolog\u00eda Marina y Oceanograf\u00eda"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.11646\/zootaxa.5252.1.1"},{"key":"e_1_2_8_19_1","first-page":"18","article-title":"Review of Japanese jawfishes of the genus Optistognathus (Opistognathidae) with description of two new species","volume":"32","author":"Smith\u2010Vaniz W. F.","year":"1985","journal-title":"Japanese Journal of Ichthyology"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.7717\/peerj.5014"}],"container-title":["Journal of Fish Biology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jfb.15473","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T06:29:00Z","timestamp":1750314540000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/jfb.15473"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,6,21]]},"references-count":19,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2023,9]]}},"alternative-id":["10.1111\/jfb.15473"],"URL":"https:\/\/doi.org\/10.1111\/jfb.15473","archive":["Portico"],"relation":{},"ISSN":["0022-1112","1095-8649"],"issn-type":[{"type":"print","value":"0022-1112"},{"type":"electronic","value":"1095-8649"}],"subject":[],"published":{"date-parts":[[2023,6,21]]},"assertion":[{"value":"2023-04-19","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-06-01","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-06-21","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}